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zzbn00

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Air gapped / Data Diode backing up arrangement

bnikolic.co.uk
1 points·by zzbn00·8 bulan yang lalu·0 comments

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zzbn00
·7 bulan yang lalu·discuss
Condensing boilers became mandatory in UK just over 20 years ago
zzbn00
·7 bulan yang lalu·discuss
This is exactly the thing. In UK electricity price is set by the cost of generating it from natural gas. After losses, etc, you get about 1/3 of power in electricity compared to heat in the gas. And the heat pump has an efficiency factor of about 3. So you get back to unity.

While electricity is priced off gas, current heat pumps do not have a strong economic case.
zzbn00
·7 bulan yang lalu·discuss
Interesting. In UK, I think the big construction companies would hire these bean-counters then use them to out-manoeuvre the ones that are hired to replace them. Quickly nobody knows what a reasonable price is, and the govmnt has to go with choice of one out of two overpriced bids. (I have no direct experience, this is just what it looks like from an observers perspective)
zzbn00
·7 bulan yang lalu·discuss
Would be interesting to read how the Austrian project was contracted out? It seems in the UK the big construction companies have got very good in extracting a lot of money from customers, wonder if things were different in Austria with this project.
zzbn00
·8 bulan yang lalu·discuss
Moved out of TCL and into Python in 2001. Perl was big at the time. But Python had REPL and numeric/numarray which swung it in my case.

(Worked out well I suppose? Almost 1/4 century and still using Python)
zzbn00
·9 bulan yang lalu·discuss
Many comments here focusing on secrets and problems. But here is another way to look at this:

Environment variables are the "indefinite scope and dynamic extent" variable bindings to make structured programs out of Unix processes. To compare them to a text file is like writing that a program needs no variables because it can read all the values it needs from an input data file when it needs them.

Environment variables are precisely to be used in situation where sub-processes need to be passed information in a way that is not necessarily affecting subsequent calls to that subprocess from another section of a program. Sometime the subprocesses are sequences of nested shells, and sometimes other more complex programs, but the same idea applies.
zzbn00
·9 bulan yang lalu·discuss
No need to go as far as Africa. Basic landline telephones spread into poorer/more rural parts of Europe only in 1980s and 1990s. Until then it was either taking the bus to see people in person, or sending a letter....

E.g. quick search revealed this pamphlet from 1988 Spain, showing that ~30% of households did not at time yet have a telephone: https://www.telefonica.com/en/wp-content/uploads/sites/5/202...
zzbn00
·9 bulan yang lalu·discuss
Yes, and it was a huge thing at the time. The social effects of all this time coordination and time tabling are one of the underlying themes of Stoker's novel Dracula.
zzbn00
·11 bulan yang lalu·discuss
Exactly this. But you don't really want to bundle straight away -- think about the exact problem you have and then solve exactly that problem. After you've sorted a few problems like this think if a bundled platform is useful.
zzbn00
·tahun lalu·discuss
“studying the Coherence theory with some applications to the propagation of electromagnetic waves through turbulent atmosphere… a humble and down-to-earth type of problem.” -> Ended up being a very important (and largerly solvable!) problem in ground-based astronomy
zzbn00
·tahun lalu·discuss
I didn't know about that, would have been right that Amazon pays damages to the copyright holder. But they did at least refund the price paid, so the readers were no worse off than at start.

Generally not a big fan of Amazon-world, but if you don't mind reading older books kindle is good value I think. My 30pence copy of Orwell's "Homage to Catalonia" was very good value, and has not yet mysteriously disappeared from my Kindles!
zzbn00
·tahun lalu·discuss
The terms of service in UK seem better in this regard than USA.

Which/why did they remove the book?
zzbn00
·tahun lalu·discuss
I agree. And the cost of ebooks is often very reasonable, Amazon are selling lots (more than one can read in a lifetime) of superb stuff in the $1-$4 range. (Makes things really difficult for the modern authors though).

Also a paper book you'd carry every day with you for a year will look in much worse state than a Kindle.

Reading e-books is an affordable past time...
zzbn00
·tahun lalu·discuss
Its great for when people need to be in the loop, looking at the data, maybe loading in Excel etc. (I use it myself...). But not enough humans around for 21 GB/s
zzbn00
·tahun lalu·discuss
Yes, but if you have decades of data, what turns on having to wait for a minute or 10 minutes to convert it?
zzbn00
·tahun lalu·discuss
I think these would add only small amount of information (and in a DB would be modelled as joins). Only adds lots of data if done very inefficiently.
zzbn00
·tahun lalu·discuss
Humans generate decisions / text information at rates of ~bytes per second at most. There is barely enough humans around to generate 21GB/s of information even if all they did was make financial decisions!

So 21 GB/s would be solely algos talking to algos... Given all the investment in the algos, surely they don't need to be exchanging CSV around?
zzbn00
·tahun lalu·discuss
There is also https://tiddlywiki.com/ that you can save anywhere
zzbn00
·tahun lalu·discuss
Maybe that would be enough. But the belt-and-braces approach of superglue with silica gel bags in a closed jar, in a fridge, seems to work well and has meant the superglue is still usable when I end up needing it....
zzbn00
·tahun lalu·discuss
I reuse ones I find in consumer goods by putting them into a jar, together with open superglue bottle(s), and putting the jar into fridge. Not a scientific study, but it does seem to keep the glue for longer then just fridge.